CVE-2012-3872 in Openconstructor
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in Open Constructor 3.12.0 allow remote attackers to inject arbitrary web script or HTML via (1) the result parameter to data/file/edit.php, (2) the q parameter to confirm.php, or (3) the keyword parameter to users/users.php.
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Analysis
by VulDB Data Team • 02/02/2025
The CVE-2012-3872 vulnerability affects Open Constructor version 3.12.0 and represents a critical cross-site scripting flaw that enables remote attackers to execute malicious web scripts or HTML code within the context of affected applications. This vulnerability manifests through three distinct attack vectors that target different components of the application's user interface and data handling mechanisms. The first vector involves the result parameter in data/file/edit.php, the second targets the q parameter in confirm.php, and the third exploits the keyword parameter in users/users.php, all of which fail to properly sanitize user input before processing or displaying it within web pages.
From a technical perspective, these vulnerabilities stem from inadequate input validation and output encoding practices within the Open Constructor application framework. The flaw occurs when user-supplied data is directly incorporated into web page content without proper sanitization or escaping mechanisms. This allows attackers to inject malicious payloads that execute in the context of other users' browsers, potentially leading to session hijacking, credential theft, or unauthorized actions performed on behalf of victims. The vulnerability aligns with CWE-79, which specifically addresses cross-site scripting flaws where untrusted data is improperly handled during web page generation, and follows the ATT&CK technique T1531 for "Establishment of Command and Control Channels" through web-based exploitation.
The operational impact of this vulnerability extends beyond simple script injection, as it can enable attackers to escalate privileges, steal sensitive information, or compromise the entire application ecosystem. When users interact with pages containing malicious content, their browsers execute the injected scripts, potentially leading to unauthorized access to administrative functions, data exfiltration, or the modification of application data. The three distinct attack vectors increase the attack surface and provide multiple pathways for exploitation, making the vulnerability particularly dangerous for applications handling sensitive user information or administrative functions. Organizations using Open Constructor 3.12.0 face significant risk of data breaches and unauthorized access if these vulnerabilities remain unpatched, as the attack requires no special privileges beyond access to the vulnerable web application.
Effective mitigation strategies for CVE-2012-3872 require immediate implementation of input validation and output encoding measures across all affected application components. The primary remediation involves sanitizing all user-supplied parameters before processing or displaying them within web pages, implementing proper HTML escaping mechanisms, and ensuring that all input data undergoes strict validation before being incorporated into dynamic web content. Organizations should also implement Content Security Policy headers to limit script execution and prevent unauthorized code injection. The vulnerability demonstrates the critical importance of proper input sanitization and output encoding practices, as outlined in OWASP Top Ten security principles and aligned with NIST cybersecurity framework guidelines for web application security. Regular security audits and code reviews should be conducted to identify similar vulnerabilities in other application components, while maintaining up-to-date security patches for all software dependencies to prevent exploitation of known vulnerabilities.